Tone Generator is a sine wave generator, frequency generator and signal generator that lets you create audio test tones, sweeps or noise waveforms using a computer. Typical Applications are generation of test tones in radio and other studios for the alignment of levels. Calibration and testing of audio equipment or speakers. Tuning music instruments as an accurate reference tone. Acoustics testing and equalisation. Quality control and testing of sound cards. White noise generator. Audio band signalling.